1.	Simplify 1 Simplify the following expression: $$ 2\times2(-3) - \left((-(-5)) + -3(-1)\right) $$ Correct Answer $$ -20$$ or -20.0000

2.	Simplify 2 Simplify the following expression: $$ \frac{4\times5 - \left(-3 + -1\right)}{2\frac{-5}{5}} $$ Correct Answer $$ -12$$ or -12.0000

3.	Fractions 1 Simplify the following expression: $$ \frac{3}{4} - \frac{5}{3} $$ Correct Answer $$ \frac{-11}{12}$$ or -0.9166666666666667

4.	Fractions 2 Simplify the following expression: $$ \frac{3}{5}\frac{-3}{6} $$ Correct Answer $$ \frac{-3}{10}$$ or -0.3

5.	Significant figures 1. Write the following to 5 significant figures: 0.00025705289 Correct Answer 0.00025705 or $$2.5705\times10^{-4}$$ 2. Write the following to 2 significant figures: 0.00036281401 Correct Answer 0.00036 or $$3.6\times10^{-4}$$

6.	Standard Form 1. Write the following in standard form to 3 significant digits: 13.8469 Correct Answer $$1.38\times10^{1}$$ 2. Write the following in standard form to 3 significant digits: 48.6812 Correct Answer $$4.87\times10^{1}$$

7.	Significant figures 1. Write the following in preferred standard form to 5 significant digits: 0.0117084 Correct Answer $$11.708\times10^{-3}$$ 2. Write the following in preferred standard form to 5 significant digits: 0.184357 Correct Answer $$184.36\times10^{-3}$$

8.	Simplify 2 Simplify the following expression: $$ 2\times6(-6)\left({(-1)}^{3} - \frac{5}{-4}\right) $$ Correct Answer $$ -18$$ or -18.0000

9.	Simplify 1 Simplify the following expression: $$ -1 - 3 + 2 - -5 - 2\times1(-1) $$ Correct Answer $$ 5$$ or 5.00000

10.	Simplify 2 Simplify the following expression: $$ 2(-2)(-1) - \frac{4}{4}\frac{-2}{-3} $$ Correct Answer $$ \frac{10}{3}$$ or 3.33333